- 產品品牌：
- 美國2B Technologies
- 產品型號：
- 205
產品簡介
美國2B公司的205型雙光束紫外光臭氧分析儀，采用新技術的254nm紫外雙光束光源技術及設計，可以同時測量被測樣品臭氧值及去臭氧的凈化空氣值。結合其它技術設計，205型雙光束紫外光臭氧分析儀的測量響應時間僅需2秒，成為市場上快響應時間的臭氧分析儀。儀器量程由1ppbv至100ppmv。該儀器具有高(1ppb)、體積小、重量輕(5磅, 2.3kg)及耗電量低。特別適合使用于航天及汽球上的大氣臭氧測量。
特點：
- 使用雙束254nm紫外光吸收法
- 高及分解度，量程由1ppbv至100ppmv
- 2秒響應時間，較同類型產品優越
- 低電量消耗，能以12V DC (5.0W)外置電源操作
- DewLineTM 技術減低水氣對儀器的干擾
- 內置數據記錄功能及實時時鐘顯示。并有3組仿真訊號輸出
- 以RS-232輸出時間、日期、臭氧濃度、儀器內溫度、氣壓及另外3組補充輪入訊號，例如外置溫度、濕度及氣壓
- 模擬輸出0-2.5V
- 選配GPS功能及CF記憶卡
應用：
- 氣球及航空的大氣測量
- 建立遙控監測網絡
- 建立城市監測網絡
- 個人及工作環境監測
- 工業生產中監測
產品規格：
| 操作原理 | 雙光束紫外光254nm燈 |
| 量程 | 1ppbv~100ppmv |
| ±2% | |
| 采樣時間 | 2秒、10秒、1分鐘、5分鐘及1小時 |
| 記憶容量 | 20,480組 |
| 輸出 | 數碼顯示，0~2.5V，RS-232 |
| 流量 | 大約1L/min |
| 尺寸 / 重量 | 90 × 210 × 290 mm / 4.7磅 |
| 電源 | 12VDC交流電 |
The Model 205 Ozone Monitorä makes use of two detection cells to improve precision, baseline stability and response time. In the Dual Beam instrument, UV light intensity measurements Io (ozone-scrubbed air) and I (unscrubbed air) are made simultaneously. Combined with other improvements, this made it possible to reduce the time between ozone measurements to 2 seconds, making our instrument the fastest UV-based ozone monitor on the market, while still retaining the small size, weight and power requirements of our popular Model 202 Ozone Monitor. Fast measurements are especially desirable for aircraft and balloon measurements where high spatial resolution is desired. Alternatively, one can choose to average more points internally to obtain even better precision.
The Model 205 has all of the features of the Model 202, including choice of averaging time (2 s, 10 s, 1 min, 5 min, 1 hr), analog output (0-2.5 V), real time serial output, internal data logger with 3 analog inputs for simultaneous logging of other measurements (e.g., T, P and RH), real time clock, and optional flash memory.
Schematic Diagram
Features
- Backup sampling pump and flow meter (now standard); if the flow rate drops below a critical value, the backup pump is activated and an indication displayed on the LCD
- Internal data logger (EEPROM), logs 14,336 lines of data
- Real time clock
- Both serial and user-scaleable analog voltage outputs (5-20 mA current output optional)
- Three 0-2.5 VDC analog inputs for logging other measurements, such as external temperature, pressure and humidity
- Convenient user interface to microprocessor, including calibration parameters (gain and zero)
- Selectable data averaging times of 10 s, 1 min, 5 min and 1 hr (custom averaging times available)
- DewLine™ for elimination of any water vapor interference, a unique feature of 2B Tech instruments
Options
- Flash Card Memory for virtually unlimited, portable data storage
- GPS for continuous logging of latitude, longitude and altitude
- Rechargeable metal hydride battery provides 12 hr of continuous operation
- External particle filter
- Serial-to-USB adapter
- Rotary vane air pump for low temperature and quiet operation
- External air pump for long pump life
Specifications
| Measurement Principle | UV Absorption at 254 nm; Dual Beam |
| Linear Dynamic Range | 1.0 ppb to 250 ppm |
| Resolution | 0.1 ppb |
| Precision (1σ; rms noise) | Greater of 1.0 ppb or 2% of reading |
| Accuracy | Greater of 1.0 ppb or 2% of reading |
| Limit of Detection (2σ) | 2.0 ppb |
| NIST-Traceable Calibration | Yes |
| Measurement Interval | 2 s (Data averaging options: 2 s; 10 s, 1 min, 5 min, 1 hr) |
| Flow Rate (nominal) | ~1.8 Liter/min |
| Flow Rate Requirement | >1.2 L/min |
| Baseline Drift |
<1 ppb/day |
| Sensitivity Drift |
<1%/day |
| Measurement Time, Frequency | 2 s, 0.5 Hz |
| Response Time, 100% of Step Change | 4 s, 2 points |
| Averaging Times | 2 s, 10 s, 1 min, 5 min, 1 hr |
| Data Storage | 14,336 lines (10 s avg. = 1.4 days; 5 min avg = 1.4 mo.) |
| Ozone Units | ppb, ppm, pphm, mg m-3, mg m-3 |
| Pressure Units | mbar, torr |
| Temperature Units | °C, K |
| T and P Corrected | Yes |
| Operating Temperature Range | 0 to 50 °C; -20 to 50 °C with low temperature modifications (rotary vane pump and lamp heater) |
| Operating Altitude Range | ~0-30 km (~30-1000 mbar) |
| Power Requirement; Supplied by battery or 110/220 VAC Power Pack |
12 V dc or 120/240 V ac, 415 mA, 5.0 watt (3.9 watt with cell heater unplugged) |
| Size | 3.5 x 8.5 x 11 inches (9 x 21 x 29 cm) |
| Weight | 4.7 lb (2.1 kg); 1.6 lb (0.7 kg) without instrument case |
| Data Logger Capacity | 14,336 lines (10 s avg. = 1.4 days; 1 min avg = 10 days; 5 min avg = 1.4 mo; 1 hr avg = 1.6 yr |
| Analog Inputs for Internal Logging of Other Instruments | 3 Analog Inputs, 0-2.5 V; For example, could log external T, P and RH |
| Data Outputs | RS232, 0-2.5 V Analog, LCD Display; External USB Converter: (Optional 4-20 mA Current; request quote) |
| Data Transfer Baud Rates | 1200, 2400, 4800, 19200 |
| Output Ranges | User Defined Scaling Factor in Menu |
| DewLine™ | Yes |
| Backup Air Pump | Yes |
| Flow Meter | Yes |
| Options | GPS, Flash Card Memory, 4-20 mA Current Output; Lamp Heater; Rotary Vane Air Pump; Long-Life External Air Pump; Rack Mount Case |
System Includes
- Model 205 Ozone Monitor
- AC Power Adapter (100-240 VAC to 12 VDC) with Country-Specific Plug
- Cigarette Lighter Adapter
- Battery Wire Connector
- Zeroing Cartridge
- Operation Manual on CD
- Calibration Data and NIST-Traceable Calibration Certificate
- Instrument Birth Certificate
- One Year Warranty
To download a brochure describing the Model 205 Ozone Monitor™ (PDF format), click on the download button below.
